Add basic, not-useful websocket server

beacon_node/websocket_server/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "websocket_server"
+version = "0.1.0"
+authors = ["Paul Hauner <paul@paulhauner.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+exit-future = "0.1.3"
+futures = "0.1.25"
+serde = "1.0"
+serde_derive = "1.0"
+slog = "^2.2.3"
+tokio = "0.1.16"
+types = { path = "../../eth2/types" }
+ws = "0.9"